Cisco 7970 Asterisk SIP - working BLF?

Hi everyone,

I have big problem with BLF lamp working on Cisco 7970G phone,
Does anyone has working correct BLF in that phone?

Phone has SIP 8.5.4
I have Asterisk 1.6 + FreePBX GUI

I did in SEP file :
(thats the only thing I’ve founded on web)

21 LABEL 100 USECALLMANAGER 5060 1

Resoult is that I have speed dial button working properly, but the line button doesn’t work.

Please help,
Thanks in advance,

Chris